[chrishajer]

What version are you using? In the trunk, line 169 of bb-settings.php does not have a foreach statement, so maybe you’re using something other than the trunk release?

That error is related to not having a my-plugins folder and I think possibly not having any plugins in that folder that start with an underscore.

This was talked about a couple times:

https://bbpress.org/forums/topic/warning-invalid-argument-supplied-for-foreach-in-bb-settingsphp-on-line-173

https://bbpress.org/forums/topic/installation-problem-cannot-modify-header-information

https://bbpress.org/forums/topic/php-error-site-mangement-plugins-page

I thought the latest 0.8.3.1 release took care of that, but maybe it doesn’t.

If it were me, I would try creating a my-plugins directory, and then making sure there were some plugins in that folder.